A NodeChangeEvent object is passed to the methods of any NodeChangeListener objects registered on a Preferences object when a child Preferences node is added or removed. getChild( ) returns the Preferences object that was added or removed. getParent( ) returns the parent Preferences node from which the child was added or removed. This parent Preferences object is the one on which the NodeChangeListener was registered.

Although this class inherits the Serializable interface, it is not actually serializable.

Figure 16-127. java.util.prefs.NodeChangeEvent

public class NodeChangeEvent extends java.util.EventObject {
// Public Constructors
     public NodeChangeEvent(Preferences parent, Preferences child);  
// Public Instance Methods
     public Preferences getChild( );  
     public Preferences getParent( );  
}

Passed To

NodeChangeListener.{childAdded( ), childRemoved( )}